I'm have a beach of a time finding accessory / ignition power in my 07 Silverado DuramaxI thought I found some under the dash, just left of my brake pedal.After one cycle of my Air Horn compressor. I lost it.Turns out. All the stuff in on that panel was 12vdc data. There seems to be networks and data all over my truck.Now I'm afraid to put my test light or multimeter on anything on my truck.

Would anybody have a link to a schematic or wiring diagram to a New Style 07 Silverado Duramax ???